[plt-scheme] Volunteers: help with Moby!

Thanks Sigrid for your questions and Danny for your code and your  
answers!

Two years ago I had an inexperienced beginning CS student who came up  
with a project idea to write a Java app for his mobile phone.  I  
didn't encourage him to pursue it that semester because it seemed like  
way too much work in the first couple of months of CS1.  But now, with  
your Moby project, a student with a bright idea like that has a  
workable option.

Geoff